Athick spherical pressure vessel of inner radius 150 mm is subjected to maximum an internal pressure of 80 mpa. calculate its wall thickness based upon the (a) principal stress theory, and (b) total strain energy theory. poisson's ratio = 0-30, yield strength 300 mpa.

Fluids at rest possess no flow energy. a)- true b)- false

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?